A hump yard is a railway yard found at some freight train stations， used to separate railway cars onto one of several tracks.。_精华吧

A hump yard is a railway yard found at some freight train stations， used to separate railway cars onto one of several tracks.。

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A hump yard is a railway yard found at some freight train stations， used to separate railway cars onto one of several tracks.。

A.正确

B.错误

正确答案：正确

Tag：游美国学英语时间：2023-12-17 22:05:58

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